Hey the Gt's have 2 cats in the stock h-pipe. The new x-pipe will replace that stock h-pipe with one hi-flow cat and it bolts from your stock manifold down to the mufflers.... I just put on shortie headers and bassani x-pipe and im selling it... If you want it. im selling it for 625. I got for a little over 800 soo your getting a deal. The x-pipe will give you have 5 to 8 horsepower to the wheels i gained 15 to the wheels so its a great bolt on. email me if you want to x-pipe and headers......
axion_sk8ter@hotmail.com